Answer:
All animals are heterotrophic and have cells with no cell wall.
Explanation:
Since animals don't perform photosynthesis or any other process to make food, and don't contain a cell wall, that is what makes them different. Protist can be both autotrophic and heterotrophic and some can contain a cell wall, but most of them don't have cell walls.
The theory of natural selection
The cell theory
Theory of extinctions
A) evolution by natural selection, sweet peas
B) inheritance by independent assortment, sweet peas
C) evolution by natural selection, Galapagos finches
D) inheritance by independent assortment, Galapagos finches
Correct answer: C). Evolution by natural selection, Galapagos finches
Charles Darwin gave the theory of natural selection in the year 1835 when he visits Galapagos Islands.
There he found several species of finches are adapted to different environmental niches. They have a different shape of the beak, food source they eat and the way they captured the food.
He observes that species vary from island to island, and based on these observations he gave the theory of natural selection.
darwin's theory is based on observations and conclusions drawn for them.
it is a causo-mechanical explanation of the origin of the species